package com.consult.config;

import com.auth0.jwt.JWT;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.interfaces.Claim;
import com.consult.config.dto.LoginDto;
import com.consult.service.IAdminService;
import com.consult.utils.TokenUtil;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Component
public class TokenInterceptor implements HandlerInterceptor {

    @Resource
    private IAdminService adminsService;
//    @Resource
//    private UsersService usersService;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        String token = httpServletRequest.getHeader("x-token");// 从 http 请求头中取出 token
        // 如果不是映射到方法直接通过
        if (!(object instanceof HandlerMethod)) {
            return true;
        }

        // 执行认证
        if (null == token) {
            throw new RuntimeException("无token，请重新登录");
        }
        // 获取 token 中的 user id
        Long userId;
        Integer userType;
        try {
            Map<String, Claim> claims = JWT.decode(token).getClaims();
            userId = claims.get("userId").asLong();
            userType = claims.get("userType").asInt();
        } catch (JWTDecodeException j) {
            throw new RuntimeException("401");
        }
        LoginDto user;
//        if (0 == userType) {
//            user = adminsService.findAdminById(userId);
//        } else {
//            user = usersService.findUserById(userId);
//        }
//        if (null == user) {
//            throw new RuntimeException("用户不存在，请重新登录");
//        }
        // 验证 token
        return TokenUtil.verify(token);
//        JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(user.getPassword())).build();
//        try {
//            jwtVerifier.verify(token);
//        } catch (JWTVerificationException e) {
//            throw new RuntimeException("401");
//        }
//        return true;

//        HandlerMethod handlerMethod = (HandlerMethod) object;
//        Method method = handlerMethod.getMethod();
        //检查是否有passtoken注释，有则跳过认证
//        if (method.isAnnotationPresent(PassToken.class)) {
//            PassToken passToken = method.getAnnotation(PassToken.class);
//            if (passToken.required()) {
//                return true;
//            }
//        }
//        //检查有没有需要用户权限的注解
//        if (method.isAnnotationPresent(UserLoginToken.class)) {
//            UserLoginToken userLoginToken = method.getAnnotation(UserLoginToken.class);
//            if (userLoginToken.required()) {
//            }
//        }
//        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }

}
